Tool for holding sheets of abrading and polishing material.



No. 889,717. I PATENTED JUNE 2, 1908. Mp0. RANDALL & A. J. CAMPBELL.

TOOL FOR HOLDING SHEETS OF ABRADING AND POLISHING MATERIAL.

APPLICATION FILED AUG. 6, 1907.

WITNESSES INVENTOHS MERTON- Qfinmohu,

HLOEXRNDBEFJCRMPBELL,

ATTORNEYS is secured'in the groove 4 so that its outer UNITED sTATEs PATENT oEEro MERTON o. RANDALL AND'ALEXANDER J. o MPBELL, or LosANeELEs, CALIFORNIA.

TOOL FOR HOLDING sHEETs' 0E AEEA ING AND roLrsrrrNe MATERIAL.

Patented June 2, 1908.

To all whom it may concern:

Our invention s an improvement in that class of devices adapted for carrying or holding sandpaper and other abrading or polishing sheets.

The construction of the device ,is hereinafter described and'shown in the accompanying drawing, in which Figure 1 is a erspective view of the tool or device, a s root of sand-paper being shown secured thereto and a portion thereof being broken away. Fig. 2 1s a plan view of the same showing the slidable clamping plate in the open position. Fig. 3 is a view of the larger end of the tool or device. Fig.

4 is a .view of the smaller end of the tapered body of the device. Fig. 5 is an enlarged cross section of the tool or device with sandpaper secured thereto. Fig. 6 is a lan view showing modification of the slidab e clamping late or strip. 1

Tiie body 1 of the tool ordevice is taered and smooth and provided with a radial engthwise-slot 2; also, with circumferential grooves 3 and-4, which, as shown in Fig. 4, extend. fromv end to end and are on opposite sides of the' radial slot 2. The'metal plate side conform'sito the curvature of the body, the edge adjacent to the slot being flush with one side of the latter as shown in Fig.

5. A movable, or 'slidable, plate or strip 1s arranged in the groove 4 o the body and similarly curved transversely and made of such thickness that it forms a smooth continuation of the outer surface of the body.- It is made practically of the same width as the groove 4 and is provided with slots 7 having an acute inclination to the groove 2. The wood screws 8 pass through these slots and secure the plate to the body 1. A band 9 encircles the butt, or larger end,, of the body or stock '1'.

In order to secure a sheet of sand-paper or othe'i abrading or olishing sheet'a: to the tool',.the"opposite e ges y, see Flg. 5, are bent inward and inserted in the groove 2, it being understood that the clamping late or strip -6 is first adjusted, as shown in ig. 2, where by its inner edge is so arated from the opposite edgeof the fixed ate 5. When the ends of the sand-paper a: ave been thus inserted in the groove,the plate or strip 6 is ulled back in the direction of the arrow, wherebyit has a compound movement, in that it moves radially on the body of the tool and thus clamps the ends y of the sand-paper, as shown in Figs. 1 and 5. It. retains this hold by friction.

As indicated in Fig. l-the. sand-paper is preferably extended overfthe small end of the ody of the tool. Thus the tool is adapted for use by dentists, jewelers, and others, for

polishing various articles.

It is ap arent that by pushing against the head of t e movable strip 6, the latter will be slid lengthwise and at the. same time moved away from the opposing edge of the fixed plate 5, thus releasing or sheet-of other material.

' In Fig. 6, we show a modification in which the slidable plate or strip 6 is rovided' with a single slot and's'crew lnstea of two as in the form of the invention shown in the other figures. The operation is, however, the same in essentials. This form of the invention is practicable because the sheet of abrading or the sand-paper hence it is only at that point it is requisite the, clamping plate shall be adapted to separate or move back from the fixed plate.

polishing material is secured ordinarily only to the reduced or smaller end'of the tool, and

r In practice the ends of abrading or polish- -ing material'are cut so that they will not only.

encircle thebody of, the tool but have about g of an inch in excess, which ortion is turned downinto the slot 2 as efore de-' scribed.

The body or stock 1 is provided at the larger end with a longitudinal bore 10, see Figs. 3 and 5, to adapt it for attachment to the spindle of a lathe or'to an other device that may be employed to faci itate its practical use.

It is obvious that owing to the inclination of the slots 7, the clamping plate will ap-.

proach or separate from the opposite edge of 105 to thedirection in the fixed plate 5 according which theplate is moved.

, What we claim' is: v I ,1. The improved tool for the purpose specified comprising a body portion having a;

longitudinal radial groove, and a slidable clamping plate arran ed on one side of such groove and adapte to slide lengthwise, means for guiding the plate away from the opposite edge of the groove when pushing in one direction and for guiding it towards the same when forced in the opposite direction, said plate being arranged onthe outer side of the body and thus forming a continuation of its circumference, as shown and described. 2. The improved tool for the purpose specified comprising the tapered body having a longitudinal radial groove 2, surface grooves 3 and 4 on opposite sides ofthe radial groove, a plate fixed in the surface groove 3, and its edge beingflush with that of the radial groove, a clamping plate arranged in the opposite surface groove 4 and provided with inclined slots, screws passing through such slots and serving to secure the :3

both plates, forming practically a smooth continuation of the surface of the body, sub- 25 stantially as described.

MERTON O. RANDALL. ALEXANDER J. CAMPBELL. Witnesses for Randall:

GROSVENOR L. WORKYNS, ARTHUR H. PALMER. Witnesses for Campbell:

WM. Hi HOLLOWAY, NELsoN G. MILLER. 

